ok im 16 years old and i had knee surgery on my right knee last thursday 10-30-08. i have to do streches with it and after doing them on saturday maybe an hour or a couple minutes later my right testicule started to hurt pretty bad. i told my dad and he said you probably pulled a groin muscle. so i said ok and let it go now it is the next monday 11-3-08 and the pain is still there and hasent weekend any. im getting a little worried. when i sit down is when i have the most pain when i stand it hurts a very very little almost not noticible. when i strain or something it throbes. im also taking some pain medicine for my knee but there are no simptomes on the sheet that they gave us of the medicne that have to deal with testicular pain. its like a dull pain thats very strong and extremely annoying. i thank all of you that reply to this post.